Beyond the rand flora pattern: Phylogeny and biogeographical history of Volutaria (compositae)

Calleja J.A., Garcia-Jacas N., Roquet C., Susanna A. (2016) Beyond the rand flora pattern: Phylogeny and biogeographical history of Volutaria (compositae). Taxon. 65: 315-332.
Link
Doi: 10.12705/652.8

Abstract:

The Rand Flora describes the disjunct phytogeographical pattern of a wide range of taxa distributed at the periphery of Africa and adjacent islands, as well as the Arabian Peninsula. We focused on Volutaria (Compositae: Cardueae: Centaurineae), a genus of ca. 18 species that conforms to the Rand Flora pattern; yet its phylogeny, interspecific relationships, and biogeographical history remain poorly known. We aim to construct a robust phylogeny that will allow us to interpret the biogeography and the diversification of this genus, together with its present distribution pattern, and to ascertain whether the latter arose by single or multiple gradual expansion processes, vicariance, or long-distance dispersal events. We sampled all extant Volutaria species, covering its entire geographical range, and generated sequences of nuclear-ribosomal DNA and three plastid regions, which were analyzed by Bayesian inference and maximum parsimony. Samples yielding more than one sequence in direct sequencing were cloned. Historical biogeographical analysis was performed using BioGeoBEARS based on a phylogeny dated using a relaxed molecular clock calibrated with a previous dating undertaken for the tribe Cardueae. Volutaria is a monophyletic taxon, having an Asian ancestor, and its present diversity is represented by four main clades that emerged in the Miocene. The earliest taxa of Volutaria to diverge are preserved in North Africa, whereas clades that diverged more recently have done so on both sides of the Sahara. This process involved both ancient and recent interspecific introgression and hybridization events, as indicated by incongruities between plastid and nuclear results, and by cloning of the ITS region. The distribution of Volutaria around two diversity poles conforms to the Rand Flora pattern, but this did not arise by a single event or process. Instead, the historical biogeography of Volutaria involves at least one migration wave from east to west, followed by the extinction of ancestral taxa and subsequent expansion and retraction events, together with speciation processes on both sides of the Sahara. The intense tectonic and climatic changes that occurred in North Africa and western Asia throughout the Neogene and Pleistocene periods might explain the present diversity and distribution pattern of the genus. © International Association for Plant Taxonomy (IAPT) 2016.

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Epiphytic bryophyte communities of Prunus lusitanica Iberian forests: Biogeographic islands shaped by regional climates

Calleja J.A., Mingorance L., Lara F. (2016) Epiphytic bryophyte communities of Prunus lusitanica Iberian forests: Biogeographic islands shaped by regional climates. Cryptogamie, Bryologie. 37: 53-85.
Link
Doi: 10.7872/cryb/v37.iss1.2016.53

Abstract:

Epiphytic communities of Iberian forests remain partly unknown and most studies have focused on the dominant oak forests. We provide a comprehensive analysis and interpretation of the epiphytic bryophyte communities of forests dominated by the Tertiary relict evergreen cherry Prunus lusitanica. This type of forest, scattered in the western and northern half of the Iberian Peninsula, harbours a noticeable richness of epiphytic bryophytes, including an outstanding number of liverwort species. Their floristic composition varies markedly across the Peninsula yet is driven by the main climate patterns prevailing in the area. Multivariate analyses (TWINSPAN, CCA) render two main groups of epiphytic communities with their respective indicator species. Both groups share a high proportion of non-Mediterranean species, a circumstance that is most remarkable in the forests that fall within the Mediterranean Region, which could be considered as ecological refuges or biogeographic islands. © 2016 Adac. Tous droits réservés.

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New National and Regional Bryophyte Records, 49

Ellis, L.T., Agcagil, E., Kırmacı, M., Aleffi, M., Bakalin, V.A., Bednarek-Ochyra, H., Cykowska-Marzencka, B., Stryjak-Bogacka, M., Bojaca, G.F.P., Fantacelle, L.B., Araújo, C.A.T., Maciel-Silva, A.S., Bruno Silva, J., Calleja, J.A., Cano, M.J., Castillo Diaz, J., Gabriel, R., Dias dos Santos, N., Enroth, J., Erzberger, P., Garilleti, R., Hájek, M., Hedenäs, L., Heras, P., Infante, M., Kiebacher, T., Koczur, A., Krawczyk, R., Kučera, J., Lebouvier, M., Lüth, M., Mazimpaka, V., Vigalondo, B., Lara, F., Nagy, J., Németh, C., Kovács, A., Nobis, M., Węgrzyn, M., Wietrzyk, P., Norhazrina, N., Vanderpoorten, A., Nowak, A., Poponessi, S., Gigante, D., Venanzoni, R., Plášek, V., Rangel Germano, S., Schäfer-Verwimp, A., Sérgio, C., Claro, D., Garcia, C.A., Shirzadian, S., Akhoondi Darzikolaei, S., Stebel, A., Suleiman, M., Yong, K.-T., Virchenko, V.M., Vončina, G., Yoon, Y.-J., Choi, H.-G., Kim, J.H. (2016) New National and Regional Bryophyte Records, 49. Journal of Bryology. : 1-21.
Link
Doi: 10.1080/03736687.2016.1225777

Abstract: